[填空题]
A projectile is fired6-1- noy nlbi8m 4g3x:pkn7 egdxzgo2 f .9bx 88t9q80y3 r jxiastsvnsrom ground level with an initial speed of 55.6 m/s at an angle oi bnjt t9xqvax88. s3y9r0ss 8f $41.2^{\circ}$ above the horizontal. (a) Determine the time necessary for the projectile to reach its maximum height. $s$ (b) Determine the maximum height reached by the projectile. $m$ (c) Determine the horizontal and vertical components of the velocity vector at the maximum height. horizontal: $m/s$ vertical: $m/s$ (d) Determine the horizontal and vertical components of the acceleration vector at the maximum height. horizontal: $m/s^2$ vertical: $m/s^2$
